Explain with suitable examples:
(i) Natural polymers
(ii) Synthetic polymers.
(i) Natural polymers: Polymers found in nature, mostly from plants and animals, are called natural polymers. Examples are starch, cellulose, proteins, nucleic acids and natural rubber.
(ii) Synthetic polymers: Polymers synthesised by human in laboratory or factory are called synthetic polymers. Examples are polypropylene, nylon-66, polybutadiene, polyvinyl chloride (PVC), phenol formaldehyde (Bakelite), polyester (Terylene).